At its Kindle Fire HD announcement event, Amazon (AMZN) CEO Jeff Bezos made it very clear the company was in the business of selling services — digital content of all sorts. As such, the company’s Amazon Game Studios division announced on Thursday the imminent release of its first mobile game for iPad, iPhone, Kindle Fire, Kindle Fire HD and Android devices: Air Patriots, a tower defense game that has players controlling “a squadron of military planes by using their finger to draw the paths the planes will follow in order to engage the enemy.” Amazon says the game is different from traditional tower defense games because “players can adjust their strategy on the fly” by quickly drawing a new flight path for their planes and redeploying firepower to where it is needed most. More →